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 Hole drilling and tapping information 
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 Post subject: Hole drilling and tapping information
PostPosted: Thu Jul 15, 2004 10:51 am 
RT GOD

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I have just scanned some pages, from my Zeus book. They may be of use to people, they may not. I have scanned the pages in regarding hole sizes and threads etc.
I have done it because over recent months I have noticed that people are asking for drilling sizes for threads etc.
I thought I would post them up, so it is an easy look up point.

Maybe the mods could even put it into a sticky somewhere.

I have also put in a couple of extra pages which are metric/inch conversion chart, trigonometry, P.C.D. hole calculations.

Metric/Inch Conversion Table:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus1.jpg
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus2.jpg

Metric Fine and BA threads:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus3.jpg

BSF threads:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus4.jpg

Whitworth threads:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus5.jpg

BSP and UNF threads:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus6.jpg

ANC and ANF threads:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus7.jpg

Metric Coarse threads:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus8.jpg

UNF Fine threads:
http://hometown.aol.co.uk/STEB9780/Zeus+Pages/zeus9.jpg

UNC Coarse threads:
http://hometown.aol.co.uk/STEB9780/Zeus ... zeus10.jpg

Hole positioning using P.C.D.:
http://hometown.aol.co.uk/STEB9780/Zeus ... zeus11.jpg

Trigonometry:
http://hometown.aol.co.uk/STEB9780/Zeus ... zeus12.jpg

Conversion Factors:
http://hometown.aol.co.uk/STEB9780/Zeus ... zeus13.jpg

Hope that this maybe of use to people.

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PostPosted: Thu Jul 15, 2004 11:06 am 
Rovertech Kiloposter

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are the holy grail :D :D

what would us engineers do without it!

perhaps the mods should make this a sticky?

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PostPosted: Thu Jul 15, 2004 11:08 am 
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wheres the JIC fitting stuff :) come on, slacker ;)


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PostPosted: Thu Jul 15, 2004 11:14 am 
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GeraintUk wrote:
wheres the JIC fitting stuff :) come on, slacker ;)


As Lee said, this is the Engineers bible, obviously they don't feel JIC is good enough to get into the bible. :twisted: :twisted: :twisted:

No on a serious note, I had never heard of JIC until you mentioned it a few weeks ago. It sounds Yanky-doodle dandy to me. I bet it maybe a relatively new thread or something so is not included in the book. My book is 8 years old, maybe it is in the newer revisions.

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PostPosted: Thu Jul 15, 2004 11:31 am 
Rovertech Kiloposter

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steb9780 wrote:
GeraintUk wrote:
wheres the JIC fitting stuff :) come on, slacker ;)


As Lee said, this is the Engineers bible, obviously they don't feel JIC is good enough to get into the bible. :twisted: :twisted: :twisted:

No on a serious note, I had never heard of JIC until you mentioned it a few weeks ago. It sounds Yanky-doodle dandy to me. I bet it maybe a relatively new thread or something so is not included in the book. My book is 8 years old, maybe it is in the newer revisions.


must of admit ive never heard of JIC either,i'll have to have hunt around tonight :D

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PostPosted: Thu Jul 15, 2004 11:53 am 
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unfortunately JIC fittings are yank, but most of the aeroquippe connections are JIC threads.
I'm sick of having to use JIC-BSP convertors, grrrr, especially how much they cost.

Wish I could get a JIC tap and die set to be honest.


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PostPosted: Thu Jul 15, 2004 11:59 am 
Rovertech Kiloposter

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do you want to see if i can source some taps?

just give me an example

example m6x.5

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PostPosted: Thu Jul 15, 2004 12:30 pm 
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They are also known as AN, or more recently SAE37.

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PostPosted: Thu Jul 15, 2004 12:35 pm 
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Grant620 wrote:
They are also known as AN, or more recently SAE37.


ill have a look tonight for you

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PostPosted: Fri Jul 16, 2004 12:48 am 
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got some bad news the jic thread is not in any of the books we have here,and we have specs that go back to the 1920's,it is not an american thread as we've done search after seach for it.

speaking with me parts inspector he has a feeling that it might be a nptf(lots of coolant temp bodys are this thread) thread but wouldn't like to put money on it.

the strange thing is we can get hold of the adapters but no info on the thread,so all can do is maybe grant or geraint sends me an adapter and we can put it on a shadow graph to work out what thread it really is.

what you might find is that jic is the adapters name ive even been on to a german company that only deals in taps and they have never heard of it and said it might be a english and not american thread.

lee

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PostPosted: Fri Jul 16, 2004 7:51 am 
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JIC (joint international council) is not a thread type, its a fitting type.
the JIC fittings will have a 37 degree flare on the end.
i think the threads themselves are UNF.

Drew


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PostPosted: Fri Jul 16, 2004 8:17 am 
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If I would have known I had some of Big G's at work. I tapped some BSP holes in his manifold bracket to put them in.
There was a large chamfer on them as Drew says.
should have got them up on the shadowgraph to find out what the thread was.

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PostPosted: Fri Jul 16, 2004 10:13 am 
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those you put in for me were BSP fittings on one side and JIC fitting on the other side.

Makes good sense the thread is not JIC, but the fitting is.

I use quite a few JIC fittings from aeroquippe, and the information would be very useful :)

Cheers for this guys......it's been very useful allready :)


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PostPosted: Fri Jul 16, 2004 10:17 am 
RT GOD

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Yeah sorry for the bad wording in my previous post. I meant they were BSP to JIC connectors.
The JIC connection had a large chamfer on it. If I remember rightly the angle was an odd angle as well.

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